The Ruby developers have released an update to the 1.9.3 series of their open source programming language, fixing a denial-of-service vulnerability. Ruby 1.9.3 patch level 327, labelled 1.9.3-p327, corrects a hash-flooding issue that could be exploited by an attacker to cause a high CPU load that can result in a denial-of-service.
The problem can be caused by an error when parsing specially crafted sequences of strings.